Update documentation

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branch : version-0.5
Add reverseF function to Arity type class

It surprisingly hard to implement using other means. It could be possible that
it's not posible at all

hideLast is required for implementation

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branch : version-0.5
Add reverse

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branch : version-0.5
Add variadic function for creating fixed vectors

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branch : version-0.5
Doc update

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branch : version-0.5
Remove old code for incremental construction of vectors and replace
it with cons for ContVec

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branch : version-0.5
Add snoc

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branch : version-0.5